From: Alan Third <alan@idiocy.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Image transformations
Date: Thu, 13 Jun 2019 23:26:26 +0100 [thread overview]
Message-ID: <20190613222626.GA12971@breton.holly.idiocy.org> (raw)
In-Reply-To: <83zhmlxo6d.fsf@gnu.org>
On Thu, Jun 13, 2019 at 10:47:38PM +0300, Eli Zaretskii wrote:
> > Date: Thu, 13 Jun 2019 20:27:24 +0100
> > From: Alan Third <alan@idiocy.org>
> > Cc: emacs-devel@gnu.org
> >
> > Or storing the basic crop and scaling information separately so you
> > don’t have to worry about the matrices at all.
>
> I'm beginning to think we should do this on all platforms, and leave
> the matrix calculation, if needed, to the terminal-specific back-ends
> (xterm.c, w32term.c, etc.). It sounds like we gain nothing by
> spilling XRender-specific stuff in image.c and letting all the other
> platforms adapt.
I think you have a fundamental misunderstanding of how the
transformation matrix is being used. It’s not specific to XRender.
Aside from a few short‐circuits the only XRender specific code is in
image_set_transform, and XRender, NS and Cairo all have their own code
in there, and use the same transformation matrix.
We could even use the same matrix with ImageMagick with a bit of work.
If we were to throw out that shared matrix code and put it into each
backend we would be simply duplicating the code. Even using a
toolkit’s built‐in crop/rotate/resize functions is probably recreating
the exact same transformation matrix in the background.
--
Alan Third
next prev parent reply other threads:[~2019-06-13 22:26 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-11 5:10 Image transformations Eli Zaretskii
2019-06-11 20:02 ` Alan Third
2019-06-12 15:30 ` Eli Zaretskii
2019-06-12 22:07 ` Alan Third
2019-06-12 22:15 ` Alan Third
2019-06-13 4:16 ` Alp Aker
2019-06-13 5:41 ` Eli Zaretskii
2019-06-13 9:19 ` Alp Aker
2019-06-13 13:05 ` Eli Zaretskii
2019-06-13 15:57 ` Alp Aker
2019-06-13 16:20 ` Eli Zaretskii
2019-06-13 19:00 ` Richard Copley
2019-06-13 19:29 ` Eli Zaretskii
2019-06-14 10:45 ` Alp Aker
2019-06-14 10:55 ` Richard Copley
2019-06-14 11:45 ` YAMAMOTO Mitsuharu
2019-06-14 11:59 ` Alp Aker
2019-06-13 16:12 ` Alan Third
2019-06-13 17:05 ` Eli Zaretskii
2019-06-13 19:35 ` Richard Copley
2019-06-13 5:48 ` Eli Zaretskii
2019-06-13 16:58 ` Alan Third
2019-06-13 17:11 ` Eli Zaretskii
2019-06-13 19:27 ` Alan Third
2019-06-13 19:39 ` Alan Third
2019-06-13 19:47 ` Eli Zaretskii
2019-06-13 22:26 ` Alan Third [this message]
2019-06-14 7:05 ` Eli Zaretskii
2019-06-14 9:57 ` Stefan Monnier
2019-06-14 10:57 ` Eli Zaretskii
2019-06-14 11:21 ` Richard Copley
2019-06-14 12:06 ` Eli Zaretskii
2019-06-14 12:49 ` Richard Copley
2019-06-14 14:16 ` Yuri Khan
2019-06-14 14:43 ` Eli Zaretskii
2019-06-14 15:55 ` Richard Copley
2019-06-15 11:00 ` Alan Third
2019-06-15 11:34 ` Eli Zaretskii
2019-06-15 10:42 ` Alan Third
2019-06-15 11:31 ` Eli Zaretskii
2019-06-16 15:22 ` Alan Third
2019-06-16 16:34 ` Eli Zaretskii
2019-06-17 21:13 ` Alan Third
2019-06-19 17:56 ` Eli Zaretskii
2019-06-24 17:54 ` Eli Zaretskii
2019-06-24 19:50 ` Stefan Monnier
2019-06-25 2:33 ` Eli Zaretskii
2019-06-25 3:28 ` Stefan Monnier
2019-06-25 4:34 ` Eli Zaretskii
2019-06-25 14:43 ` Stefan Monnier
2019-06-25 15:35 ` Eli Zaretskii
2019-06-26 0:28 ` YAMAMOTO Mitsuharu
2019-06-26 15:34 ` Eli Zaretskii
2019-06-27 3:37 ` YAMAMOTO Mitsuharu
2019-06-27 13:13 ` Eli Zaretskii
2019-06-25 18:33 ` Alan Third
2019-06-25 18:57 ` Eli Zaretskii
2019-06-27 13:59 ` Eli Zaretskii
2019-06-28 18:36 ` Alan Third
2019-06-28 19:50 ` Eli Zaretskii
2019-06-29 11:55 ` Eli Zaretskii
2019-06-29 19:51 ` Alan Third
2019-06-29 19:49 ` Alan Third
2019-06-29 19:53 ` Lars Ingebrigtsen
2019-06-30 14:38 ` Alan Third
2019-06-30 15:24 ` Lars Ingebrigtsen
2019-07-25 19:40 ` Lars Ingebrigtsen
2019-07-26 6:10 ` Eli Zaretskii
2019-07-26 6:46 ` Lars Ingebrigtsen
2019-07-26 8:06 ` Eli Zaretskii
2019-07-26 8:23 ` Lars Ingebrigtsen
2019-07-26 8:24 ` Lars Ingebrigtsen
2019-07-26 8:33 ` Eli Zaretskii
2019-07-26 8:58 ` Lars Ingebrigtsen
2019-07-26 9:13 ` Eli Zaretskii
2019-07-26 10:23 ` Lars Ingebrigtsen
2019-07-26 14:08 ` Stefan Monnier
2019-07-26 8:32 ` Eli Zaretskii
2019-06-29 21:05 ` Stefan Monnier
2019-06-30 15:12 ` Eli Zaretskii
2019-06-30 19:10 ` Alan Third
2019-07-01 14:55 ` Eli Zaretskii
2019-06-18 11:01 ` Tak Kunihiro
2019-06-13 17:41 ` Eli Zaretskii
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